BMS 7S 20A Li-ion Protection Board

The compact BMS (Battery Management System) 7S 20A protection and balancing module is designed for assembling and safely operating 24V battery packs based on Li-ion cells (18650, 21700, and others). Protection and balancing: It continuously monitors each of the 7 cells, preventing overcharging above 4.25V, over-discharging below 2.75V and short circuits, and equalizes cell voltages during charging. Common Port: Loads and chargers are connected through shared power terminals (C- / B-), which greatly simplifies the switching circuit. Compact and reliable: Suitable for electric transport, 24V backup power supplies, portable speakers and LED lighting. Features: Configuration - 7S (7 Li-ion cells in series, nominal 25.2 V / 25.9 V, full charge 29.4 V). Battery type - Li-ion / Li-Po (3.6 V / 3.7 V per cell). Maximum discharge current - 20 A (continuous). Maximum charge current - 10 A. Port type - Common Port (B-, C-). Balancing function - Yes (With balance). Overcharge protection threshold - 4.25 V ±0.05 V. Over-discharge protection threshold - 2.75 V ±0.1 V. Protection - Overcharge, over-discharge, short circuit, overcurrent, and thermal protection (external NTC sensor). Package contents - BMS 7S 20A board, balance lead with connector.